public async Task <Package> ReflowAsync(string id, string version)
{
var package = _packageService.FindPackageByIdAndVersion(id, version);
if (package == null)
{
return(null);
}
// Must suspend the retry execution strategy in order to use transactions.
using (EntitiesConfiguration.SuspendRetriableExecutionStrategy())
{
using (var transaction = _entitiesContext.GetDatabase().BeginTransaction())
{
// 1) Download package binary to memory
using (var packageStream = await _packageFileService.DownloadPackageFileAsync(package))
{
using (var packageArchive = new PackageArchiveReader(packageStream, leaveStreamOpen: false))
{
// 2) Determine package metadata from binary
var packageStreamMetadata = new PackageStreamMetadata
{
HashAlgorithm = Constants.Sha512HashAlgorithmId,
Hash = CryptographyService.GenerateHash(packageStream.AsSeekableStream()),
Size = packageStream.Length,
};
var packageMetadata = PackageMetadata.FromNuspecReader(packageArchive.GetNuspecReader());
// 3) Clear referenced objects that will be reflowed
ClearSupportedFrameworks(package);
ClearAuthors(package);
ClearDependencies(package);
// 4) Reflow the package
var listed = package.Listed;
package = _packageService.EnrichPackageFromNuGetPackage(
package,
packageArchive,
packageMetadata,
packageStreamMetadata,
package.User);
package.LastEdited = DateTime.UtcNow;
package.Listed = listed;
// 5) Save and profit
await _entitiesContext.SaveChangesAsync();
}
}
// Commit transaction
transaction.Commit();
}
}
return(package);
}
public async Task HardDeletePackagesAsync(IEnumerable <Package> packages, User deletedBy, string reason, string signature, bool deleteEmptyPackageRegistration)
{
List <PackageRegistration> packageRegistrations;
// Must suspend the retry execution strategy in order to use transactions.
using (EntitiesConfiguration.SuspendRetriableExecutionStrategy())
{
using (var transaction = _entitiesContext.GetDatabase().BeginTransaction())
{
// Increase command timeout
_entitiesContext.SetCommandTimeout(seconds: 300);
// Keep package registrations
packageRegistrations = packages.GroupBy(p => p.PackageRegistration).Select(g => g.First().PackageRegistration).ToList();
// Backup the package binaries and remove from main storage
// We're doing this early in the process as we need the metadata to still exist in the DB.
await BackupPackageBinaries(packages);
// Remove the package and related entities from the database
foreach (var package in packages)
{
await ExecuteSqlCommandAsync(_entitiesContext.GetDatabase(),
"DELETE pa FROM PackageAuthors pa JOIN Packages p ON p.[Key] = pa.PackageKey WHERE p.[Key] = @key",
new SqlParameter("@key", package.Key));
await ExecuteSqlCommandAsync(_entitiesContext.GetDatabase(),
"DELETE pd FROM PackageDependencies pd JOIN Packages p ON p.[Key] = pd.PackageKey WHERE p.[Key] = @key",
new SqlParameter("@key", package.Key));
await ExecuteSqlCommandAsync(_entitiesContext.GetDatabase(),
"DELETE pf FROM PackageFrameworks pf JOIN Packages p ON p.[Key] = pf.Package_Key WHERE p.[Key] = @key",
new SqlParameter("@key", package.Key));
await _auditingService.SaveAuditRecordAsync(CreateAuditRecord(package, package.PackageRegistration, AuditedPackageAction.Delete, reason));
package.PackageRegistration.Packages.Remove(package);
_packageRepository.DeleteOnCommit(package);
}
// Commit changes to package repository
await _packageRepository.CommitChangesAsync();
// Remove package registrations that have no more packages?
if (deleteEmptyPackageRegistration)
{
await RemovePackageRegistrationsWithoutPackages(packageRegistrations);
}
// Commit transaction
transaction.Commit();
}
}
// handle in separate transaction because of concurrency check with retry
await UpdateIsLatestAsync(packageRegistrations);
// Force refresh the index
UpdateSearchIndex();
}
public async Task SoftDeletePackagesAsync(IEnumerable <Package> packages, User deletedBy, string reason, string signature)
{
List <PackageRegistration> packageRegistrations;
// Must suspend the retry execution strategy in order to use transactions.
using (EntitiesConfiguration.SuspendRetriableExecutionStrategy())
{
using (var transaction = _entitiesContext.GetDatabase().BeginTransaction())
{
// Increase command timeout
_entitiesContext.SetCommandTimeout(seconds: 300);
// Keep package registrations
packageRegistrations = packages
.GroupBy(p => p.PackageRegistration)
.Select(g => g.First().PackageRegistration)
.ToList();
// Backup the package binaries and remove from main storage
// We're doing this early in the process as we need the metadata to still exist in the DB.
await BackupPackageBinaries(packages);
// Store the soft delete in the database
var packageDelete = new PackageDelete
{
DeletedOn = DateTime.UtcNow,
DeletedBy = deletedBy,
Reason = reason,
Signature = signature
};
foreach (var package in packages)
{
package.Listed = false;
package.Deleted = true;
packageDelete.Packages.Add(package);
await _auditingService.SaveAuditRecordAsync(CreateAuditRecord(package, package.PackageRegistration, AuditedPackageAction.SoftDelete, reason));
}
_packageDeletesRepository.InsertOnCommit(packageDelete);
// Commit changes
await _packageRepository.CommitChangesAsync();
await _packageDeletesRepository.CommitChangesAsync();
transaction.Commit();
}
}
// handle in separate transaction because of concurrency check with retry
await UpdateIsLatestAsync(packageRegistrations);
// Force refresh the index
UpdateSearchIndex();
}
public async Task UpdateIsLatestAsync(PackageRegistration packageRegistration)
{
// Must suspend the retry execution strategy in order to use transactions.
using (EntitiesConfiguration.SuspendRetriableExecutionStrategy())
{
if (await TryUpdateIsLatestAsync(_entitiesContext, packageRegistration))
{
return;
}
// Retry the update in case a concurrency conflict was detected on the first attempt.
int retryCount = 1;
do
{
await Task.Delay(_randomGenerator.Value.Next(0, 1000));
_trace.Information(String.Format("Retrying {0} for package '{1}' ({2}/{3})",
nameof(UpdateIsLatestAsync), packageRegistration.Id, retryCount, UpdateIsLatestMaxRetries));
// Since EF contexts are short-lived and do not really support refresh, we will use a
// different context than the request on retry to avoid putting the request context in
// a bad state. More than likely the retry will detect that the concurrent update has
// already made the right updates and no changes will be necessary.
using (var detachedRetryContext = CreateNewEntitiesContext())
{
var detachedPackageRegistration = detachedRetryContext.PackageRegistrations.SingleOrDefault(
pr => pr.Id == packageRegistration.Id);
if (await TryUpdateIsLatestAsync(detachedRetryContext, detachedPackageRegistration))
{
return;
}
}
retryCount++;
}while (retryCount <= UpdateIsLatestMaxRetries);
}
}
